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Finding the Fourth Proportional to 65,239.28, 90,027.80 and 35,430.64

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Solution

The fourth proportional to 65,239.28, 90,027.80 and 35,430.64 is: 48,892.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,239.28 : 90,027.80 = 35,430.64 : x
  2. Step 2: Convert to fraction form
    65,239.28/90,027.80 = 35,430.64/x
  3. Step 3: Cross multiply
    65,239.28x = 90,027.80 × 35,430.64
  4. Step 4: Simplify right side
    65,239.28x = 3,189,742,571.79
  5. Step 5: Solve for x
    x = 3,189,742,571.79/65,239.28
  6. Step 6: Final answer
    x = 48,892.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.